ci: build dyplomat as part of CI (#700)

Even though dyplomat has no tests, we should still add it to CI to get
a signal when dependabot wants to update the Go dependencies. We just
want to know whether it still builds.

Signed-off-by: James Peach <jpeach@apache.org>

build/do_ci.sh

@@ -22,6 +22,7 @@ make examples
 make test
 make integration
 
-cd ./xdsmatcher
-make test
+make -C xdsmatcher test
 # TODO(snowp): Output coverage in CI
+
+make -C examples/dyplomat test

examples/dyplomat/Makefile

@@ -0,0 +1,8 @@
+.PHONY: test
+test:
+	go test ./... -race
+.PHONY: coverage
+coverage:
+	go test ./... -race -covermode=atomic -coverprofile=coverage.out
+coverage_html: coverage
+	go tool cover -html=coverage.out

examples/dyplomat/main.go

@@ -3,10 +3,11 @@ package main
 import (
 	"context"
 	"fmt"
-	"github.com/envoyproxy/go-control-plane/pkg/resource/v3"
 	"net"
 	"time"
 
+	"github.com/envoyproxy/go-control-plane/pkg/resource/v3"
+
 	"google.golang.org/grpc"
 
 	core "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
@@ -71,7 +72,7 @@ func main() {
 	}
 
 	if err := grpcServer.Serve(lis); err != nil {
-		fmt.Errorf("", err)
+		fmt.Printf("%v", err)
 	}
 }
 

xdsmatcher/Makefile

@@ -1,10 +1,12 @@
 .PHONY: test
 test:
 	go test ./... -race
+.PHONY: coverage
 coverage:
 	go test ./... -race -covermode=atomic -coverprofile=coverage.out
 coverage_html: coverage
 	go tool cover -html=coverage.out
+.PHONY: proto
 proto: test/proto/*
 	protoc --proto_path=test/proto --go_out=test/proto --go_opt=paths=source_relative test.proto